Integrated selective-firing detonator special for oil and gas wells

Abstract

The invention discloses an integrated selective-firing detonator special for oil and gas wells, including an integrated selective-firing detonator body and a detonation transmission device for receiving and transmitting external detonation signals to control selective firing of perforating bullets. The integration of the detonation transmission device, the selective-firing detonator body, and grounding protection components reduces assembly procedures and improves system integrity and reliability. The cooperation between a control mechanism and a selective-detonation mechanism significantly enhances the reliability of the product. Meanwhile, a grounding nut and a high-temperature shell improve electrical safety. The compact structure simplifies operation and improves working efficiency.

What is claimed is: 
     
         1 . An integrated selective-firing detonator special for oil and gas wells, comprising an integrated selective-firing detonator body ( 2 ), a detonation transmission device ( 1 ) being connected to an end of the integrated selective-firing detonator body ( 2 ) and used for receiving an external detonation signal and transmitting the external detonation signal to the integrated selective-firing detonator body ( 2 ) to control selective firing of perforating bullets, a grounding nut ( 3 ) being connected to an end, away from the detonation transmission device ( 1 ), of the integrated selective-firing detonator body ( 2 ), a positioning disc ( 4 ) being mounted on an outer surface of the integrated selective-firing detonator body ( 2 ), a side surface, away from the grounding nut ( 3 ), of the positioning disc ( 4 ) being fixed to an end of the detonation transmission device ( 4 ), and a plastic denotating member ( 5 ) being mounted on the outer surface of the integrated selective-firing detonator body ( 2 ) extending into the detonation transmission device ( 1 );
 wherein, the integrated selective-firing detonator body ( 2 ) comprises a shell, an outer surface of the shell is connected to an inner surface of the positioning disc ( 4 ), a selective-detonation mechanism is mounted on an inner wall of the shell, and a control mechanism is mounted at an end of the selective-detonation mechanism and used for controlling selective firing of the perforating bullets;   the shell comprises an upper shell body ( 21 ), a lower shell body ( 22 ) is detachably mounted on a side of the upper shell body ( 21 ), the upper shell body ( 21 ) and the lower shell body ( 22 ) are clamped together, and outer surfaces of the upper shell body ( 21 ) and the lower shell body ( 22 ) away from the detonation transmission device ( 1 ) are in threaded fit with an inner surface of the grounding nut ( 3 );   the selective-detonation mechanism comprises a selective-firing circuit board ( 25 ), an outer surface of the selective-firing circuit board ( 25 ) is adaptively clamped on inner walls of the upper shell body ( 21 ) and the lower shell body ( 22 ), a superior contact pin cap ( 27 ) is connected to a side, away from the detonation transmission device ( 1 ), of the selective-firing circuit board ( 25 ), an outer surface of the superior contact pin cap ( 27 ) is adaptively clamped on an inner wall of a contact surface between the upper shell body ( 21 ) and the lower shell body ( 22 ), an internal circlip ( 26 ) is arranged on an outer side of the superior contact pin cap ( 27 ), and a side surface of the internal circlip ( 26 ) is connected to end surfaces, away from the detonation transmission device ( 1 ), of the upper shell body ( 21 ) and the lower shell body ( 22 );   an end, close to the detonation transmission device ( 1 ), of the selective-firing circuit board ( 25 ) extends out of the upper shell body ( 21 ) and the lower shell body ( 22 ) and fixedly connected to a detonator ( 23 ), and an outer surface of the detonator ( 23 ) is connected to an inner wall of the plastic detonating member ( 5 );   subordinate conducting pogo pins ( 24 ) are fixedly mounted on the outer surface of the selective-firing circuit board ( 25 ) close to the detonator ( 23 ) and symmetrically arranged with respect to a center line of the selective-firing circuit board ( 25 ), ends of the subordinate conducting pogo pins ( 24 ) extend out of the upper shell body ( 21 ) and the lower shell body ( 22 ), outer surfaces of the subordinate conducting pogo pins ( 24 ) are connected to the inner walls of the upper shell body ( 21 ) and the lower shell body ( 22 ), subordinate conducting plates ( 6 ) are connected to the ends of the subordinate conducting pogo pins ( 24 ), and outer surfaces of the subordinate conducting plates ( 6 ) are fixed to the inner wall of the plastic detonating member ( 5 );   the inner surface of the positioning disc ( 4 ) is connected to the outer surfaces of the upper shell body ( 21 ) and the lower shell body ( 22 ), a bolt is threadedly connected to an outer surface of the positioning disc ( 4 ), and ends of the bolt extend into the positioning disc ( 4 ) and are in contact with the outer surfaces of the upper shell body ( 21 ) and the lower shell body ( 22 ) to fasten the upper shell body ( 21 ) and the lower shell body ( 22 );   grounding pogo pins ( 28 ) are fixedly mounted on the outer surface of the selective-firing circuit board ( 25 ) and symmetrically arranged with respect to the center line of the selective-firing circuit board ( 25 ), and ends of the grounding pogo pins ( 28 ) are connected to the inner walls of the upper shell body ( 21 ) and the lower shell body ( 22 );   the control mechanism comprises a bridge-wire ( 29 ), the bridge-wire ( 29 ) is fixedly mounted on an extension plate on sides, close to the detonation transmission device ( 1 ), of the subordinate conducting pogo pins ( 24 ) and used for generating heat to trigger an explosion, and the detonator ( 23 ) is disposed around the bridge-wire ( 29 ).